MBProgressHUD是一個開源項目，實現了很多種樣式的提示框，使用上簡單、方便，并且可以對顯示的內容進行自定義，功能很強大，很多項目中都有使用到。到GitHub上可以下載到項目源碼https://github.com/jdg/MBProgressHUD，下載下來后直接把MBProgressHUD.h和MBProgressHUD.m拖入工程中就行，別忘了選擇拷貝到工程。完了在需要使用的地方導入頭文件就可以開始使用了。首先看下工程截圖：

接下來是整個Demo的完整界面，這里我只選擇出了幾個常用的對話框，其他樣式的在源碼提供的Demo里可以找到，要用的話直接參考就可以。

接下來直接上代碼了，頭文件部分：

#import <UIKit/UIKit.h>
#import "MBProgressHUD.h"

@interface ViewController : UIViewController
{
    //HUD（Head-Up Display，意思是抬頭顯示的意思）
    MBProgressHUD *HUD;
}

- (IBAction)showTextDialog:(id)sender;
- (IBAction)showProgressDialog:(id)sender;
- (IBAction)showProgressDialog2:(id)sender;
- (IBAction)showCustomDialog:(id)sender;
- (IBAction)showAllTextDialog:(id)sender;

@end

實現文件（按鈕實現部分）：

- (IBAction)showTextDialog:(id)sender {
    //初始化進度框，置于當前的View當中
    HUD = [[MBProgressHUD alloc] initWithView:self.view];
    [self.view addSubview:HUD];
    
    //如果設置此屬性則當前的view置于后臺
    HUD.dimBackground = YES;
    
    //設置對話框文字
    HUD.labelText = @"請稍等";
    
    //顯示對話框
    [HUD showAnimated:YES whileExecutingBlock:^{
        //對話框顯示時需要執行的操作
        sleep(3);
    } completionBlock:^{
        //操作執行完后取消對話框
        [HUD removeFromSuperview];
        [HUD release];
        HUD = nil;
    }];
}

- (IBAction)showProgressDialog:(id)sender {
    HUD = [[MBProgressHUD alloc] initWithView:self.view];
    [self.view addSubview:HUD];
    HUD.labelText = @"正在加載";
    
    //設置模式為進度框形的
    HUD.mode = MBProgressHUDModeDeterminate;
    [HUD showAnimated:YES whileExecutingBlock:^{
        float progress = 0.0f;
        while (progress < 1.0f) {
            progress += 0.01f;
            HUD.progress = progress;
            usleep(50000);
        }
    } completionBlock:^{
        [HUD removeFromSuperview];
        [HUD release];
        HUD = nil;
    }];
}

- (IBAction)showProgressDialog2:(id)sender {
    HUD = [[MBProgressHUD alloc] initWithView:self.view];
    [self.view addSubview:HUD];
    HUD.labelText = @"正在加載";
    HUD.mode = MBProgressHUDModeAnnularDeterminate;
    
    [HUD showAnimated:YES whileExecutingBlock:^{
        float progress = 0.0f;
        while (progress < 1.0f) {
            progress += 0.01f;
            HUD.progress = progress;
            usleep(50000);
        }
    } completionBlock:^{
        [HUD removeFromSuperview];
        [HUD release];
        HUD = nil;
    }];
}

- (IBAction)showCustomDialog:(id)sender {
    HUD = [[MBProgressHUD alloc] initWithView:self.view];
    [self.view addSubview:HUD];
    HUD.labelText = @"操作成功";
    HUD.mode = MBProgressHUDModeCustomView;
    HUD.customView = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Checkmark"]] autorelease];
    [HUD showAnimated:YES whileExecutingBlock:^{
        sleep(2);
    } completionBlock:^{
        [HUD removeFromSuperview];
        [HUD release];
        HUD = nil;
    }];
    
}

- (IBAction)showAllTextDialog:(id)sender {
    HUD = [[MBProgressHUD alloc] initWithView:self.view];
    [self.view addSubview:HUD];
    HUD.labelText = @"操作成功";
    HUD.mode = MBProgressHUDModeText;
    
    //指定距離中心點的X軸和Y軸的偏移量，如果不指定則在屏幕中間顯示
//    HUD.yOffset = 150.0f;
//    HUD.xOffset = 100.0f;
    
    [HUD showAnimated:YES whileExecutingBlock:^{
        sleep(2);
    } completionBlock:^{
        [HUD removeFromSuperview];
        [HUD release];
        HUD = nil;
    }];
}

依次實現的效果如下：

下面這個效果就類似Android中的Toast：

以上就簡單介紹了MBProgressHUD的使用，這里都是采用block的形式來操作的，這樣寫起代碼來更直觀也更高效。

歡迎關注我的新浪微博和我交流：@唐韌_Ryan